Dust-guard for axle-boxes.



PATENTED OCT. 6, 1903. A. BREN.l v DUST GUARD FOR AXLE BXES.

APPLIOATION FILED I-IOV. 19. 19,02.

H0 KODEL.

@L di 75232:

#ZA/42M MW UNITED STATES f 'Patented October 6, 1903.

ADDISON BOREN, 0F PITTSBURG, PENNSYLVNlA.

DUST-GUARD FOR AXLE-BOXES. f

SPECIFICATION forming part of Letters Patent No. 740,621, dated October 6, 1903. V'-

Application filed November 19. 1902. SerialNo. 131,932. (No model.) l

To f1/ZZ zuhont t may concern:

Be it known that l, ADD'ISON HOREN, a resident of Pittsburg, in the county of Allegheny and State ot Pennsylvania, have invented a new and useful Improyement inDu'st-Guards for Axle-Boxes; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to dust-guards -fori axle-boxes, its object being to provide a simple form of guard which will effectively act to exclude the dust from the axle-box, as well as prevent the escape of lubricant, and at the saine time one which is simple in construction and which maybe manufactured at small cost.

To these ends my invention comprises, generally stated, in conjunction with an axle-box of the ordinary construction, a dustguard' consisting` of an outer casing having outwardly-extending flanges along its outer edges and an opening for the passage of the axle, together with an inner casinghavin g inwardlyextending anges adapted to enter said metallic frame and suitable packing material interposed betweenthe iianges of said frame and casing and projecting' beyond same,where by a very strong and simple construction is obtained, with the packing material so arranged as to be securely held in place and to eiiectively exclude the dust from the axle-box.

In the accompanyingdrawings, Figure 1 represents a sectional View of an axle-box with my invention applied thereto. Fig. 2 is a view of the dust-guard removed and shown half in section, and Fig. 3 is a vertical section of my improved dust-guard. Like numerals indicate like parts.

The axle-box 2 may -be of the ordinary construction, having the Ordin ary bearings 3 and the door 4. At the rear of the boit 2 is the seat or guideway for the reception of the dust-guard.

My improved dust-guard consists of the box-V l in the outer casing 6, space being left between the outwardly-extending iianges 7 of the casing 6 and4 the inwardly-extending iianges 11 of the casing 10. Into this space so formed the packing 14 is inserted, said packing being formed of leather or vany other suitableA material. The packing is forced or driven down into the space between the iiangcs 7 and 11, so las to iit tightly therein, and further means may be employed, if necessary, to secure said packing in place.

The said packing 14 projects slightly beyond the flanges of the casing G and casing 10, so that when the guard is inserted into the seat 5 of the axleboX the packing will press closely against the inner walls of said seat, s0 as to form a Very of the lubricant. The packing 14 further actsv to hold the frame of the dust-guardV snugly within the seat 5, so 'that said -frame does not partake of any movement caused by the play of the axle, which is taken up by the movable bearing-blocks about to be described.

`:Bearing-blocks 15 16 are contained within the casings 6 and 10, said blocks being acted on by the springs 17, inserted in the upper and lower ends of the casing 10, the action of said springs being such as to force the bearing-blocks into contact with the aXleQ. Leather or other suitable 'packing material 18 is carried by the bearing-blocks 15 16, said packing surrounding the axle and'bearing closely thereon owing to the action of the springs 17. The bearing-blocks '15 16 are constructed so as not to completely encircle the axle, the space 19 being left to allow for wear, this wear being taken up by the action of the springs 17, so that thepacking materiallS is always held in contact with the axle. By the use of the flange 12 vthecasing 10 is held securely within the casing 6, and no fastening means is necessary, as'the packing 14 bears directly on the iiange 12 and acts to hold the casing l() securely in position within the casing 6. Y

A portion of the casing 10 is out away, as at 20, so as to permit the return to the axleboX of anyoil carried by the axle into the dust-guard. This oil will naturally be carried tothe lower end of the dustguard, and by the cutting away of the casing at 2O this IOO oil is permitted to return to the axle-box, thereby preventing the waste of the oil. A portion of the lower bearing-block is beveled oi, as at 21, so that the movement of said block will tend to force any oil collected in the casing back into the axle-box.

If the lower bearing-block were not beveled in the manner described, the jarring action of the bearing-block would tend to cause the oil to seep in both directions and allow it to escape inwardly or away from the axle-box. By having the bearing-block beveled in the manner described the jarring action of the block will tend to force the oil back into the axle-box, while the opening 20 permits the oil to find its Way back into the axle-box.

To furtheraid in preventing the escape of the lubricant, the lower edges of the casing 6 may be provided with felt or other suitable packing 22.

lVhen my improved dust-guard is in use l and is inserted in the seat in the axle-box, it

remains stationary therein, with its packing pressing against the walls of said seat to prevent the entrance of dust, rbc., or the escape of the lubricating material.. Vhile the frame of my dust-guard remains ixed'in its seat the bearing-blocks have sufficient movement with relation to each other to provide for wear or for the play of the axle.

A dust-guard constructed in accordance with my invention is Very simple in construction, being composed of few parts and readily removable, while at the same time it will act to eectively prevent the entrance of dust to the box and at the same time reduce the waste of oil.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. A dust-guard comprising an outer casing having` outwardly-projecting Hang-es, an inner casin g entering said outer easing and having inwardly-projecting iianges, and packing material inserted between the iianges of said casings and extending beyond said casings.

2. A dust-guard comprising an outer casing having outwardly-extending I'lan ges, an inner casing having inwardly and vertically extending flanges within said outer casing, and packing interposed between the outwardly and inwardly extending anges and extending beyond said casings.

3. The combination with an axle-box having a seat therein, of a dust-guard compris-4 ing an outer casing, an inner casing within said outer casing, packing material inter-A posed between said casings, the lower portion of said inner casing being cut away to form an outlet to said axle-box. Y

4:. The combination with an axle-box having a seat therein, of a dust-guard compris- Witnesses:

ROBERT C. TOTTEN, G. C. RAYMOND-` 

